Residential steam and hot-water boiler replacement projects across Nassau County with written scope, pricing, and scheduling confirmed before authorized work.
New boilers starting at $5,000 installed with 10-year warranty. Financing is subject to credit approval.
Boiler replacement begins with the existing system, load, fuel, radiation, piping, venting, controls, domestic-hot-water needs, access, and applicable permits. The project proposal states the selected equipment and required system changes.
A replacement should account for steam or hydronic distribution and not simply match the old boiler's input rating. Existing radiation, piping, chimney, condensate, and control conditions can change the design. Call for a current appointment window or emergency ETA; timing depends on technician availability, location, traffic, weather, and demand. Project timing is an estimate until the written proposal identifies equipment availability, permits, inspections, access, site conditions, and the authorized scope. Financing is subject to credit approval. Current plans, APRs, terms, and qualification details are maintained on our financing page and may change.
If your boiler shows any of these symptoms, it may be time to consider replacement
Cast-iron boilers last longer than furnaces, but efficiency drops sharply past 25 years
Spending $500+ per year on repairs — especially on circulator pumps or controls
Leaking sections or rust on the heat exchanger indicate structural failure
Old boilers lose efficiency — you're paying more for the same heat
Some radiators hot, others cold — the boiler can't maintain consistent output
A cracked heat exchanger or failed draft is a safety emergency
Your replacement boiler depends on your home's existing distribution system
Common in pre-war and mid-century Nassau County homes with cast-iron radiators
Homes with existing steam radiators in Garden City, Floral Park, Manhasset
Uses baseboard or radiant floor distribution — most popular replacement choice
Most homes — offers the widest range of efficiency options
Provides both space heating and instant domestic hot water in one compact unit
Smaller homes looking to free up space and eliminate water heater
See how your boiler's age affects your annual heating costs
| Boiler Age | Typical AFUE | Next Step | Recommendation |
|---|---|---|---|
| 5–15 years | 80–87% | Monitor condition and combustion | Monitor |
| 15–25 years | 70–80% | Compare measured performance | Plan Ahead |
| 25–35 years | 60–70% | Price repair and replacement | Replace Soon |
| 35+ years | 50–60% | Prioritize safety inspection | Replace Now |
Three tiers to match your budget, system type, and efficiency goals
Cast-Iron / Atmospheric
82–85% AFUE
From $5,000
Budget-conscious replacement for steam or hot water systems
Get Free EstimateCondensing Wall-Hung
95% AFUE
From $8,000
Homes whose distribution temperatures and venting support condensing operation
Get Free EstimateCondensing Combi
95–98% AFUE
From $12,000
Smaller homes wanting to eliminate the water heater
Get Free EstimateAll installations include old boiler removal, permits, and 10-year warranty. Oil-to-gas conversions from $7,000. Review financing options →
Not sure if your boiler needs a repair or full replacement? Use this guide.
| Factor | Repair | Replace |
|---|---|---|
| Boiler Age | Under 20 years | Over 25 years |
| Repair Cost | Under 40% of new unit | Over 50% of new unit |
| AFUE Rating | Above 80% | Below 70% |
| Frequency | First major repair | 2+ repairs per season |
| Fuel Bills | Stable or slight rise | Rising 20%+ yearly |
| Leaks / Corrosion | Minor valve drip | Section or exchanger leak |
Still not sure? We'll give you an honest assessment — no pressure.
Get Expert Advice: (516) 259-1191Ended after 2025
The federal 25C credit ended for property placed in service after December 31, 2025.
Verify in writing
Eligibility and amounts must be confirmed for the address and selected equipment before purchase.
Subject to approval
Plans, APRs, terms, and qualification details may change and are subject to credit approval. Learn more →
HEAR is a separate rebate program previously known as HEEHRA; this page does not promise HEAR eligibility or an amount.
Equipment capability is confirmed from the make, model, age, condition, and requested scope before scheduling.









Don't see your equipment listed? Call us to confirm service capability for the make and model.
Share the address, existing equipment, goals, and access conditions.
Review load, distribution, electrical or fuel requirements, controls, permits, and site conditions.
Confirm equipment, included work, exclusions, price, coverage terms, and anticipated schedule in writing.
Work begins only after the project-specific proposal is accepted.
Professional boiler replacement in 30+ communities
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Free in-home estimates · Financing subject to credit approval · 10-year warranty